CVE-2026-81720
Last modified
CVE-2026-81720 is a medium-severity vulnerability rated 6.2/10 on the CVSS scale. openssl_encrypt before 1.4.9 fails to validate the memory_cost parameter from identity file protection blocks, allowing attackers to trigger out-of-memory conditions during key derivation. Attackers with write access to local identity stores can craft malicious identity files with excessive memory_cost values that cause the host to crash when unlocking identities before authentication.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.
Description
openssl_encrypt before 1.4.9 fails to validate the memory_cost parameter from identity file protection blocks, allowing attackers to trigger out-of-memory conditions during key derivation. Attackers with write access to local identity stores can craft malicious identity files with excessive memory_cost values that cause the host to crash when unlocking identities before authentication.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jahlives | Openssl Encrypt | < 1.4.9 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-81720?
How severe is CVE-2026-81720?
How do I fix CVE-2026-81720?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-81715openssl_encrypt (pip package openssl-encrypt) versions <= 1.…3.3
- CVE-2026-81716openssl_encrypt (pip: openssl-encrypt) versions before 1.4.9…5.2
- CVE-2026-81717openssl_encrypt (pip package openssl-encrypt) before 1.4.9 c…3.5
- CVE-2026-81718openssl_encrypt versions before 1.4.9 use under-parameterize…7.5
- CVE-2026-81719openssl_encrypt before 1.4.9 executes untrusted third-party …7.8
- CVE-2026-8172The Simple Basic Contact Form WordPress plugin through 20250…7.1
- CVE-2026-81721openssl_encrypt before 1.4.9 fails to validate KDF cost para…7.5
- CVE-2026-81722nltk PorterStemmer in versions <= 3.10.2 (fixed in 3.10.3) c…7.5
- CVE-2026-81723NLTK versions before 3.10.3 contain a quadratic CPU exhausti…3.7
- CVE-2026-81724NLTK before 3.10.3 contains an uncontrolled recursion vulner…5.3
- CVE-2026-81725NLTK before 3.10.3 contains a regular expression denial of s…3.7
- CVE-2026-81726NLTK through 3.10.3 contains a path traversal vulnerability …7
Are you affected by CVE-2026-81720?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST